public string Decrypt(Secret secret)
{
string plainText = null;
using (MemoryStream msDecrypt = new MemoryStream(secret.Data))
{
// Create an AesManaged object with the specified key and IV.
using (Aes aesAlg = new AesManaged())
{
aesAlg.Key = _key;
aesAlg.IV = secret.IV;
// Create a decrytor to perform the stream transform.
ICryptoTransform decryptor = aesAlg.CreateDecryptor();
using (CryptoStream csDecrypt = new CryptoStream(msDecrypt, decryptor, CryptoStreamMode.Read))
{
using (StreamReader srDecrypt = new StreamReader(csDecrypt, Encoding.Unicode))
{
// Read the decrypted bytes from the decrypting stream
// and place them in a string.
plainText = srDecrypt.ReadToEnd();
}
}
}
}
return plainText;
}
public Secret Encrypt(string plainText)
{
Secret result = new Secret();
using (MemoryStream ms = new MemoryStream())
{
using (Aes aesAlg = new AesManaged())
{
aesAlg.Key = _key;
result.IV = aesAlg.IV;
ICryptoTransform encryptor = aesAlg.CreateEncryptor();
using (CryptoStream cs = new CryptoStream(ms, encryptor, CryptoStreamMode.Write))
{
byte[] rawPlaintext = Encoding.Unicode.GetBytes(plainText);
cs.Write(rawPlaintext, 0, rawPlaintext.Length);
cs.FlushFinalBlock();
// get the encrypted text
ms.Seek(0, SeekOrigin.Begin);
byte[] content = new byte[ms.Length];
ms.Read(content, 0, content.Length);
result.Data = content;
}
}
}
return result;
}
public static string Decrypt(PublicSecret secret, string key)
{
Secret internalSecret = new Secret() {
IV = Convert.FromBase64String(secret.IV),
Data = Convert.FromBase64String(secret.Data)
};
AESEncryption encryptor = new AESEncryption(key);
return encryptor.Decrypt(internalSecret);
}